This picture of my 71 Cuda was taken very early in the morning in low light. I think the lighting is perfect in the early morning. It really makes the color of the car "pop".
I also really like pictures in a natural setting. Here is my old 70 Challenger taken in a park near my house.
One of my all time favorites is to take car pictures in the fall. I have one that I took on a back country road where all of the trees are yellow and under the canopy of the trees with the sunlight peeking through the plum crazy Challenger just plain "popped" I do not have the picture loaded in photobucket but I'll try to add a copy to show what I mean.